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"You keep hearing 'Linux is like way cool! Use Linux!' Linux is
cool, and even useful, but migrating from other platforms or
integrating Linux hosts into an existing network takes a bit more
work and knowledge than giving a careless wave of your hand, which
is a minor detail that seems to escape the attention of
enthusiastic Linux evangelists. Most sysadmins do not have the
luxury of starting from scratch, and must make do with existing
setups of varying (in)sanity and (il)logic.

"The premier program for integrating Windows and Linux is Samba,
which ace admins already know and love. Samba can be a
cross-platform print and file server, a primary domain controller
for a Windows LAN, and even a full member of an NT or Active
Directory domain..."